Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cham voi di snippets" » "cham hoi di snippets", "pham voi di snippets", "cham soc di snippets", "cham voi doi snippets", "cham voi dai snippets", "cham toi di snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("cham voi di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cham voi di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cham voi di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cham voi di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.